Musk Loses OpenAI Lawsuit on Statute of Limitations

Synopsis

On 18 May 2026, a federal jury in Oakland, California, unanimously dismissed all of Elon Musk's claims against OpenAI and CEO Sam Altman, finding that his lawsuit fell outside the statute of limitations. The decision, which was adopted by Judge Yvonne Gonzalez Rogers in minutes, puts an end, at least for now, to Musk's quest to recover damages of up to $134 billion and to compel leadership changes at the world's most closely-watched Artificial Intelligence company. Musk has promised to take the matter to appeal.

The trial that captured the attention of Silicon Valley — and lasted only minutes

It had been a highly publicized trial in the recent history of the tech industry. The case started on 27 April 2026, with Elon Musk himself appearing on the witness stand, which he did again three days later, on 28 April, and was cross-examined by OpenAI's main legal representative. Microsoft CEO Satya Nadella was also on the witness stand. OpenAI's CEO, Sam Altman, and President Greg Brockman appeared in support of the company's course.

The nine-person advisory jury was closed at 8:30 a.m. PT on the morning of 18 May for deliberation. At 10:23 a.m., the courtroom deputy handed Judge Yvonne Gonzalez Rogers a note. She announced, 'We know what to do. It had only taken the jury a little over two hours to come to their verdict.

The conclusion: All of Musk's claims were barred by a three-year statute of limitations. The jury was never told the substance of Musk's charges. Judge Gonzalez Rogers took the jury's verdict as granted and dismissed the case.

The Roots of the Dispute: A Founding Vision and Parting Ways

Founded in December 2015, OpenAI is a nonprofit organization, founded by Musk, Sam Altman, Greg Brockman, Ilya Sutskever, and others. It's supposed to be building artificial general intelligence for the betterment of humankind — and the founders were concerned about the potential risks of any one person or organization using a powerful, for-profit AI.

Musk has made a total investment of $44 million in OpenAI from 2016 to 2020. But by early 2018, the partnership between Musk and the rest of OpenAI's leadership had soured. Musk suggested either acquiring a majority stake in an OpenAI subsidiary, or that OpenAI become a part of Tesla. The other co-founders, Altman, Brockman and Sutskever among them, declined. Musk departed from the board in February 2018, in public saying he believed there was a potential conflict of interest regarding Tesla's AI efforts.

OpenAI then went on to create a capped-for-profit subsidiary in 2019, which was backed by a $1 billion investment from Microsoft. Its valuation was valued at tens of billions of dollars in 2023, and its ChatGPT was the fastest growth consumer application ever. Meanwhile, Musk has established his own rival AI company, xAI, in 2023.

The Lawsuit: Breach of Charitable Trust

In November 2024, Musk filed a motion for preliminary injunction to prevent OpenAI from switching from a nonprofit to a fully for-profit organization. He filed a broader civil suit in 2024, claiming that Altman, Brockman, and Microsoft violated a "breach of charitable trust" by abandoning OpenAI's origins of being a nonprofit for commercialization.

The law firm representing Musk called for damages of up to $180 billion — described as “ill-gotten gains” — and for Altman and Brockman to be removed from their roles and for the for-profit corporate structure to be dissolved. At trial, the damages claimed were narrowed down to some $134 Billion.

There was a counter-narrative from OpenAI's lawyers: that indeed, the Musk family had floated a for-profit model of OpenAI, just so long as they could keep it under their control. They said that the lawsuit was not a principled stand to protect the charities' way of running business, but was a "tactical move to harm a business competitor" following the failure of the set-up to get its hands on the organization.

The Verdict and Its Immediate Aftermath

The jury unanimously agreed that Musk's claims were barred by the state's three-year statute of limitations. Therefore, the court was not asked to determine, err, if OpenAI had indeed breached a charitable trust. Judge Gonzalez Rogers, who took the advice of the jury and tossed the case, said, “I've always said I would accept the jury's verdict.”

Microsoft's attorney released a statement welcoming the decision: "However, the facts and the timeline in this case have long been clear and we welcome the jury's decision to dismiss these claims as untimely. We remain committed to our work with OpenAI to advance and scale AI for people and organisations around the world.

Outside the courthouse, Musk's attorney Marc Toberoff told reporters that things were “not over, I can sum it up in one word: appeal.” Toberoff explained that the issue was really about "preserving charities from this kind of exploitation.

The Wealthy Goliaths of the AI Industry.The Big Boys of the AI Industry

The judgment has repercussions that go beyond the feud between Musk and Altman. If the lawsuit succeeds on its merits, it could force OpenAI and Microsoft to cough up $150 billion to OpenAI's nonprofit foundation, which would change the ownership dynamics of the leading AI company and impact its planned initial public offering, which is set to be among the largest in history.

The timing is particularly noteworthy. Altman's OpenAI and Musk's xAI are both pushing for going public, and both of the flotations are expected to be record-breaking. The lawsuit's dismissal represents a major bright spot for the legal journey of OpenAI.

It also brought to light, in unprecedented detail, the early inner dynamics of OpenAI, and how much of its transformation from nonprofit toward a capped-for-profit toward a fully commercial organization was predicted or approved by the original OpenAI founders.

The Future of OpenAI in the legal field

The ruling doesn't put an end to the legal battle for either side. In April 2025, OpenAI sued Musk for his actions, which they claimed were a deliberate attempt to derail the company's growth to the detriment of his competing interests at xAI. That action is pending.

In April 2025, a group of 12 former employees of OpenAI filed an amicus brief with the court, claiming that OpenAI had forsaken its nonprofit status and that Altman had "directly lied" to his employees about how much he knew about the forced non-disparagement agreements. Harvard Law Professor Lawrence Lessig drafted the brief.

The final verdict is not yet in on whether — and how — this type of AI company with OpenAI's size and human impact should be controlled, but this is not the first issue that arose during the debate. The jury's verdict thus marks a procedural threshold for the time being: regardless of how valid the merits of the claims by Musk are, they have, for the time being, been expunged from this forum by the law.